From: Warren Toomey <wkt@henry.cs.adfa.oz.au>
Message-Id: <199803280050.LAA05410@henry.cs.adfa.oz.au>
Subject: Re: Bug in Bob Supnik's Emulator!
To: pete@dunnington.u-net.com
Date: Sat, 28 Mar 1998 11:50:54 +1100 (EST)
Cc: edgee@cyberpass.net, pups@minnie.cs.adfa.oz.au
In-Reply-To: <9803270628.ZM27283@indy.dunnington.york.ac.uk> from Pete Turnbull at "Mar 27, 98 06:28:52 am"
Reply-To: wkt@cs.adfa.oz.au
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-pups@minnie.cs.adfa.oz.au
Precedence: bulk

In article by Pete Turnbull:
> Hi, Ed.
> 
> > I've had a chance to do some further research on this, and it seems
> > to me that the bug is definitely in Supnik's emulator.  What do you
> > all think?  Am I onto something?  If so, what part of Supnik's code
> > is probably to blame?
> 
> Interesting...  did you use the same binary on both Bob's emulator and Ersatz?
> 
> > 3. Peter Turnbull wrote me that factor running on under uv7 on his
> > PDP-11/23 runs the test case 'factor 6' without error.

> I'd suggest you recompile factor if you have the source, but add some
> debugging. If you can't do that, you could try running it with adb (the
> debugger, man 1 adb for details).

I suspect the FP emulation in Bob's Emulator, so it might be worth
watching the floating point values in the program. Bob mailed me during
the week, and I sent him a virgin binary of factor so he could verify that
there is a bug.

	Warren